CN220666093U - Sand dune erosion control system - Google Patents

Abstract

The application relates to a sand dune erosion control system, comprising a first control unit and a second control unit, wherein the first control unit is installed at the front edge of a sand dune, and can support and maintain the water side edge of the sand dune so as to control the erosion of the sand dune; the second control unit is arranged at the front edge of the coastline, and a space is reserved between the second control unit and the first control unit; in the gravity direction, the top height of the first control unit is higher than that of the second control unit, one surface of the first control unit facing the second control unit is defined as a first mounting surface, and one surface of the second control unit facing the first control unit is defined as a second mounting surface; the first mounting surface is at least partially recessed from the first control unit and the second mounting surface is at least partially recessed from the second control unit. The first control unit comprises a plurality of sand ladders, each sand ladder comprises a first frame body and a plurality of first plate members, each first frame body is provided with a bent supporting member which is concave inwards, and the plurality of first plate members are inserted into the bent supporting members.

Description

Sand dune erosion control system

Technical Field

The application relates to the technical field of ocean engineering, in particular to a sand dune erosion control system.

Background

The movable dunes are important components of coastal areas, and their existence provides important beach protection, reduces damage to coastal areas from sea waves, wind and tides, and prevents coastal floods, floods and other disasters. In addition, moving dunes are also important biodiversity habitats where vegetation, animals and marine organisms can gain safe habitats. However, the beach sand amount is reduced under the influence of artificial activities, and the sand dunes are continuously degenerated under the action of the same sea waves and wind power, so that habitats, houses and the like are threatened. In order to ensure the safety of living environment in coast, measures of heightening and reinforcing embankments are generally adopted. However, these measures often require a lot of manpower and material resources; the adopted hard bank protection affects the water ecological environment, and sand dunes are kept stable by building breakwater and artificial sand supplementing, but most breakwater extends from a shoreline to the ocean direction, so that the manufacturing cost is high, the transverse sand conveying movement along the bank is artificially blocked, and the balance of an ecological system is affected to a certain extent.

Disclosure of Invention

The embodiment of the application provides a sand dune erosion control system, which can reduce the flow rate by dissipating the impact force of waves on one hand and cut off sediment carried by the waves at a natural sand dune to serve as a sand source of the sand dune; on the other hand, the water flow scouring force during wave relief can be reduced, and the sand on the beach surface layer is prevented from being eroded by waves.

The sand hill erosion control system provided by the embodiment of the application comprises:

a first control unit mounted to a front edge of a sand hill, the first control unit being capable of supporting and holding a water side edge of the sand hill to control erosion of the sand hill;

a second control unit mounted at a front edge of the coastline with a space therebetween;

in the gravity direction, the top height of the first control unit is higher than that of the second control unit, one surface of the first control unit facing the second control unit is defined as a first mounting surface, and one surface of the second control unit facing the first control unit is defined as a second mounting surface; the first mounting surface is at least partially recessed from the first control unit and the second mounting surface is at least partially recessed from the second control unit.

In an alternative solution, the first control unit includes a plurality of sand ladders, the sand ladders include a first frame body and a plurality of first plate members, the first frame body has a curved supporting member recessed inwards, the plurality of first plate members are inserted into the curved supporting member, and at least part of the first plate members in the plurality of first plate members have different insertion angles with the curved supporting member; the curved support member and the plurality of first plate members form the first mounting surface.

In an alternative scheme, the first control unit further comprises a shore protection plate, the shore protection plate is arranged at the end part of the bent supporting member and faces the second control unit, the direction of the horizontal plane is defined as a first direction, and an included angle between the shore protection plate and the first direction is an acute angle.

In an alternative scheme, the bending support member is provided with a plurality of notches along the length direction, the first plate members are inserted and arranged in the notches, two adjacent first plate members are connected through a fixing piece, and a gap is reserved between the two adjacent first plate members.

In an alternative scheme, the first frame body comprises a bottom member, a supporting member and a supporting beam, wherein one end of the bending supporting member in the length direction is fixedly connected with the bottom member, and the other end of the bending supporting member is connected with the supporting member; the support beam is disposed between the curved support member, the base member, and the support member.

In one alternative, the fastener includes a fastening assembly and a spacer block, the spacer block being located at least partially between two adjacent first plate members, the fastening assembly being capable of securing the two adjacent first plate members and the spacer block.

In an alternative, the second control unit includes a plurality of sand ladder reefs, the sand ladder reefs including a second frame body and a plurality of second plate members, the second frame body including the second mounting surface facing the sand ladder and a third mounting surface facing away from the sand ladder, a portion of the third mounting surface being concave inward from the second frame body and another portion being convex outward from the second frame body;

the plurality of second plate members are fixedly mounted to the second mounting surface and the third mounting surface of the second frame body.

In an alternative solution, at least some of the second plate members and the second frame body have different plugging angles, at least some of the adjacent two second plate members are connected by a fixing piece, and a gap is formed between the adjacent two second plate members.

In an alternative, the second control unit further includes a positioning member located at a lower portion of the second frame body, the positioning member having a cavity capable of inflation and deflation.

In an alternative, the second control unit further comprises a streamer connected between a plurality of the second frames, the streamer being capable of connecting and towing the second frames.

The beneficial effects of this application embodiment lie in:

in the embodiment of the application, the sand dune erosion control system comprises a first control unit and a second control unit, wherein the first control unit is arranged at the front edge of a sand dune, the second control unit is arranged at the front edge of a coastline, and the sand dune erosion control system can reduce the flow rate by dissipating the impact force of waves on one hand and cut off sediment carried by the waves at a natural sand dune to serve as a sand source of the sand dune; on the other hand, the water flow scouring force during wave relief is reduced, and the sand on the beach surface layer is prevented from being eroded by waves.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a schematic view of the installation structure of the sand hill erosion control system of the present application in one specific embodiment;

FIG. 2 is a schematic view of a part of a sand ladder provided by the present application;

FIG. 3 is a schematic cross-sectional view of a sand ladder according to the present disclosure;

FIG. 4 is a schematic side elevational view of the sand ladder of FIG. 3 in its installed position;

FIG. 5 is a schematic side view of sand after stacking of sand ladders;

FIG. 6 is a schematic flow of storm wave forces on a sand ladder;

FIG. 7 is a schematic view of the sand ladder after the storm is over;

FIG. 8 is a schematic view of the cross-sectional A-A configuration of FIG. 4;

FIG. 9 is a schematic view of the cross-sectional B-B structure of FIG. 1;

fig. 10 is a schematic view of an installation structure of the sand ladder reef in one embodiment provided in the present application.

Reference numerals: the sand control unit 1, the sand ladder 10, the first frame 11, the first plate member 12, the curved support member 13, the shore protection plate 14, the recess 15, the fixture 16, the fastening assembly 161, the spacer 162, the bottom member 17, the support member 18, the support beam 19, the sand dune 2, the second control unit 3, the sand ladder reef 30, the second frame 31, the second plate member 32, the positioning member 33, the streamer 34, the coastline 4, the vessel 5, the living place 6, the gap 7.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

For a better understanding of the technical solutions of the present application, embodiments of the present application are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

As shown in fig. 1 to 10, the embodiment of the present application provides a sand hill 2 erosion control system, which can reduce the flow rate by dissipating the impact force of waves on one hand and intercept the sand carried by the waves at the natural sand hill 2 as the sand source of the sand hill 2; on the other hand, the water flow scouring force during wave relief can be reduced, and the sand on the beach surface layer is prevented from being eroded by waves. The sand dune 2 erosion control system comprises a first control unit 1 and a second control unit 3, wherein the first control unit 1 is installed at the front edge of the sand dune 2, and the first control unit 1 can support and hold the water side edge of the sand dune 2 to control the erosion of the sand dune 2; the second control unit 3 is arranged at the front edge of the coastline 4, and a space is reserved between the second control unit 3 and the first control unit 1;

in the gravity direction, the top height of the first control unit 1 is higher than the top height of the second control unit 3, and one surface of the first control unit 1 facing the second control unit 3 is defined as a first mounting surface, and one surface of the second control unit 3 facing the first control unit 1 is defined as a second mounting surface; the first mounting surface is at least partially recessed from the first control unit 1 and the second mounting surface is at least partially recessed from the second control unit 3.

The coastal ecosystem includes, in addition to the sand dunes 2 and the coastline 4, sea water with waves, seafloor with seabed sand and beach with sand, and in addition, the coastal ecosystem may have a living place 6 close to the sand dunes 2. The waves formed by the seawater break at some point before reaching the coastline 4, creating a strong scouring force on the beach. Under normal weather conditions, the above-mentioned wave action on the beach will not reach the dune 2. However, during storms, the wave forces on the beach may be greater. The reason why the damage to the beach and dune 2 caused by the waves during the storm is greater is that the height of the waves increases due to severe weather conditions. Wave forces acting directly on the dune 2 will cause erosion of the dune 2; meanwhile, beach sand is eroded back into the sea water during the wave-breaking process.

Therefore, the present embodiment uses the first control unit 1 and the second control unit 3 in combination, so that the loss of sand from the dune 2 and the loss of sand from the beach can be effectively reduced. When used in combination, the sand hill 2 and the coastline 4 of the coastal ecosystem can be prevented from being corroded, wherein the first control unit 1 can prevent the sand hill 2 from being corroded, and the second control unit 3 can prevent the coastline 4 from being corroded, and the area formed by the interval between the first control unit 1 and the second control unit 3 can well protect the coastal ecosystem. The first control unit 1 and the second control unit 3 may be used in combination or may be used alone, and are not specifically exemplified herein.

As shown in fig. 1 to 9, in one embodiment, the first control unit 1 includes a plurality of sand ladders 10, the sand ladders 10 include a first frame 11 and a plurality of first plate members 12, the first frame 11 has a curved supporting member 13 recessed inwards, the plurality of first plate members 12 are inserted into the curved supporting member 13, and at least part of the plurality of first plate members 12 are inserted into the curved supporting member 13 at different angles; the bending support member 13 and the plurality of first plate members 12 form a first mounting surface. Sha Ti 10 are placed at the front edge of the dune 2 facing the beach and sea water. More specifically, the sand ladder 10 will become the leading edge of the sand dune 2, thereby supporting and maintaining the water side edge of the sand dune 2 to maintain the structural integrity of the sand dune 2.

In particular, each sand ladder 10 will have a different length, which will depend on the particular sand hill 2 that needs to be protected. However, the preferred incremental length of the sand ladder 10 will be between 3 and 6 m. For example, if the length of the dune 2 to be protected is 30m, 10 sand ladders 10 that are 3m long or 5 sand ladders 10 that are 6m long may be used.

In a specific embodiment, the first control unit 1 further includes a shore protection plate 14, where the shore protection plate 14 is disposed at an end of the curved support member 13 and faces the second control unit 3, and a direction defining a horizontal plane is a first direction, and an included angle between the shore protection plate 14 and the first direction is an acute angle. The bending support member 13 is provided with a plurality of notches 15 along the length direction thereof, the first plate members 12 are inserted and arranged in the notches 15, two adjacent first plate members 12 are connected through a fixing piece 16, and a gap 7 is formed between the two adjacent first plate members 12; the shoreline 14 serves as a front anchor for the sand ladder 10 to prevent collapse of the sand ladder 10 due to water flow flushing under the sand ladder 10.

As shown in fig. 1-9, once all the first panel members 12 are mounted in their respective recesses 15 after the first control unit 1 is installed, the first panel members 12 are connected together in increments along their longitudinal lengths by fasteners 16. In particular, depending on the frequency of wave action of the sand ladder 10 reaching a particular location, a different number of fasteners 16 may be used along the length of the sand ladder 10.

In one embodiment, the first frame 11 includes a bottom member 17, a support member 18, and a support beam 19, and one end of the curved support member 13 in the length direction is fixedly connected to the bottom member 17, and the other end is connected to the support member 18; the support beam 19 is disposed between the curved support member 13, the base member 17, and the support member 18.

As shown in fig. 4, when the sand ladder 10 is installed, the sand ladder 10 will have a leading edge defined by the shoreline 14, which is buried in sand at the bottom or toe of the sand hill 2, which will preferably cover about one third to one half of the curved surface formed by the plurality of plate members. Thus, the bottom member 17 closest to the shore protection plate 14 will be buried under the sand at the time of installation, and the first plate member 12 closer to the top of the sand ladder 10 is exposed to the field of view when the sand ladder 10 is seen from the direction of the sea water. In addition, at installation, the support members 18 of the sand ladder 10 and the uppermost first plate member 12 will be aligned with the upper surface of the sand dune 2, and the bottom of the curved support members 13 of the sand ladder 10 will be brought up against the sand dune 2, so that substantially all of the sand ladder 10, i.e. a large part of the sand ladder 10, will be buried in the sand dune 2.

As shown in fig. 8, in one particular embodiment, the fastener 16 includes a fastening assembly 161 and a spacer block 162, the spacer block 162 being at least partially located between two adjacent first plate members 12, the fastening assembly 161 being capable of securing the two adjacent first plate members 12 and the spacer block 162. Specifically, each spacer block 162 has an aperture extending therethrough through which a portion of the fastening assembly 161 is to be inserted. The spacer block 162 will be placed between the two first plate members 12 and then the fastening assembly 161 will be inserted such that adjacent plate members are secured together. Each plate member has a first surface substantially facing water and a second surface substantially facing the sand dune 2. The fastening assembly 161 may be any of a variety of known fasteners, for example, the fastening assembly 161 may be a bolt and nut system.

As shown in fig. 6, when the sand ladder 10 particularly plays a protective role, the curved surface formed by the plurality of first plate members 12 of the sand ladder 10 is such that a gap 7 exists between the adjacent two first plate members 12, when sea water reaches the sand ladder 10 in the form of waves or broken waves, sea water will be partly absorbed into the sand dune 2 through the sand ladder 10 through the gap 7 and will be partly reflected back to the sea water in a curved arc. It is the effect of the penetration of the seawater through the gaps 7 between the first plate members 12 that causes the sand of the sand hill 2 directly below and directly behind the sand hill 10 to coagulate and densify, thereby holding the sand hill 10 in place as the front surface of the sand hill 2. Thus, when seawater flushes or breaks down the sand ladder, seawater not only permeates through the gaps 7 of the sand ladder, but also suspended sand particles in the water permeate through the gaps 7. This continuous replenishment of sand between the first plate members 12 prevents the loss of sand.

As shown in fig. 9 to 10, in a specific embodiment, the second controlling unit 3 includes a plurality of sand ladder reefs 30, the sand ladder reefs 30 include a second frame body 31 and a plurality of second plate members 32, the second frame body 31 includes a second installation surface facing the sand ladder 10, and a third installation surface facing away from the sand ladder 10, and a part of the third installation surface is concave in the second frame body 31, and another part of the third installation surface is convex out of the second frame body 31; the plurality of second plate members 32 are fixedly mounted to the second mounting surface and the third mounting surface of the second frame body 31. The sand ladder reef 30 may be completely submerged in the sea water when installed for use.

In a specific embodiment, at least part of the second plate members 32 of the plurality of second plate members 32 are different in plugging angle with the second frame body 31, at least part of two adjacent second plate members 32 are connected by the fixing piece 16, and a gap 7 is formed between the two adjacent second plate members 32.

The second plate member 32 and the second frame 31 in the sand ladder reef 30 are substantially identical in construction to the sand ladder 10, and thus the structure of the sand ladder reef 30 will not be described again here, but it should be noted that the second installation surface of the sand ladder reef 30 facing the coastline 4 does not function alone in preventing erosion of the beach, but functions together with the third installation surface facing the sea water. The shape of the third mounting surface is to substantially mimic the shape of the sea floor and coastline 4. In particular, the shape of the sea floor immediately in front of the coastline 4 is substantially concave, but at the coastline 4 the surface becomes convex. The purpose of this concave/convex second curved surface of the sand ladder reef 30 is to cause the waves to break prematurely as they pass the sand ladder reef 30, thereby dissipating some of the energy of the wave impact force.

As shown in fig. 9, the waves are releasing energy and become reduced waves between the sand reef 30 and the coastline 4, it is the waves that are reduced that help prevent the waves from strongly "slapping" on the beach. It is also the wave that is reduced in size that prevents many waves from reaching the dune 2. Thus, the sand ladder reef 30, whether working alone or in combination with the sand ladder 10, will help reduce erosion of the sand dunes 2 and coastline 4.

In some other embodiments, the second prevention and control unit 3 further includes a positioning member 33, the positioning member 33 being located at a lower portion of the second frame 31, the positioning member 33 having a cavity capable of being inflated and deflated. In particular, the positioning member 33 may also be located directly below the outermost edges of the first and second curved surfaces of the sand ladder reef 30. The positioning member 33 is basically a buoy that can be selectively filled with air to allow the sand ladder reef 30 to float and thus drag the sand ladder reef 30 to its desired position.

As shown in fig. 10, three sand ladder reefs 30 are fixed to the ship 5 by means of streamers 34, and during towing, the positioning members 33 are filled with air so that the sand ladder reefs 30 float on the water surface. Once the final position is reached, the air is discharged out of the structure using the sea water so that the sand reef 30 is submerged in the bottom of the sea water. Furthermore, the gap 7 between the first plate members 12 of the sand ladder 10 and the gap 7 between the second plate members 32 of the sand ladder reef 30 allow the growth of halograss, and the sand ladder 10 and the sand ladder reef 30 are made of a material that is not affected by erosion, thus not contaminating the beach ecosystem.

The sand dune 2 erosion control system in the embodiments of the present application, the first plate member 12 and the second plate member 32 are arranged in an overlapping, non-contact manner, thereby forming openings between the plate members, facilitating sand deposition. The sand stabilization system firmly maintains the sand ladder 10 or the sand ladder reef 30 in its position, maintaining the stable development of the sand dune 2.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A sand dune erosion control system, comprising:

a first control unit mounted to a front edge of a sand hill, the first control unit being capable of supporting and holding a water side edge of the sand hill to control erosion of the sand hill;

a second control unit mounted at a front edge of the coastline with a space therebetween;

in the gravity direction, the top height of the first control unit is higher than that of the second control unit, one surface of the first control unit facing the second control unit is defined as a first mounting surface, and one surface of the second control unit facing the first control unit is defined as a second mounting surface; the first mounting surface is at least partially recessed from the first control unit and the second mounting surface is at least partially recessed from the second control unit.

2. The sand hill erosion control system of claim 1, wherein the first control unit comprises a plurality of sand ladders, the sand ladders comprise a first frame body and a plurality of first plate members, the first frame body has a curved support member recessed inwards, the plurality of first plate members are inserted into the curved support member, and at least some of the plurality of first plate members have different insertion angles with the curved support member; the curved support member and the plurality of first plate members form the first mounting surface.

3. The sand dune erosion control system of claim 2, wherein the first control unit further comprises a revetment plate disposed at an end of the curved support member and oriented toward the second control unit, the direction defining a horizontal plane being a first direction, the revetment plate being at an acute angle to the first direction.

4. A dune erosion control system according to claim 3, wherein the curved support member is provided with a plurality of recesses along its length, the first plate members are inserted into the recesses, adjacent two of the first plate members are connected by a fixing, and a gap is provided between adjacent two of the first plate members.

5. A dune erosion control system according to claim 3, wherein the first frame body comprises a base member, a support member and a support beam, one end of the curved support member in the length direction being fixedly connected to the base member, the other end being connected to the support member; the support beam is disposed between the curved support member, the base member, and the support member.

6. The sand dune erosion control system of claim 4, wherein said securing member comprises a securing assembly and a spacer block, said spacer block being at least partially positioned between adjacent two of said first plate members, said securing assembly being capable of securing adjacent two of said first plate members and said spacer block.

7. A sand dune erosion control system according to any of claims 2-6, wherein the second control unit comprises a plurality of sand ladder reefs comprising a second frame body and a plurality of second plate members, the second frame body comprising the second mounting face towards the sand ladder and a third mounting face facing away from the sand ladder, a portion of the third mounting face being recessed from the second frame body and another portion protruding outwardly from the second frame body;

the plurality of second plate members are fixedly mounted to the second mounting surface and the third mounting surface of the second frame body.

8. The sand dune erosion control system according to claim 7, wherein at least some of the second plate members of the plurality of second plate members have different insertion angles with the second frame body, at least some of the adjacent two second plate members are connected by a fixing member, and a gap is provided between the adjacent two second plate members.

9. The sand dune erosion control system of claim 7, wherein the second control unit further comprises a positioning member located at a lower portion of the second frame body, the positioning member having a cavity capable of inflation and deflation.

10. The sand dune erosion control system of claim 9, further comprising a streamer connected between a plurality of said second frames, said streamer being capable of connecting and towing said second frames.